Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 2003 Thermal Physics

The major difference between a pure semiconductor and a pure metal is that

A

metals are harder than semiconductor

B

while resistance of metals decrease with temperature , the reverse is the case for semiconductor

C

the resistance of metals increases with temperature, while for semiconductors, it is the reverse

D

metals have forbidden gaps while semiconductors have not

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Physics WAEC / WASSCE 2003 Thermal Physics

A platinum resistance thermometer has a resistance 4\(\Omega\) at 0oC and 10\(\Omega\) at 100oC. Assuming the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45oC.

A

14.0\(\Omega\)

B

6.7\(\Omega\)

C

3.2\(\Omega\)

D

2.7\(\Omega\)

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Physics WAEC / WASSCE 2003 Thermal Physics

Which of the following statement about latent heat of vaporization is correct? It

A

weakens the adhesive force between molecules of a liquid and those of its container

B

breaks completely the force of attraction completely between the molecules of a liquid

C

add to the heat content of a liquid

D

increases the cohesive forces between liquid molecules

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Physics WAEC / WASSCE 2003 Thermal Physics

Which of the following statements is true of ultra violet radiations? It

A

supports the sensation of hearing

B

does not cause the emission of electrons from metals

C

is an electromagnetic wave

D

is not capable of causing sun burns

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Physics NECO SSCE 2003 Thermal Physics

How much heat is required to convert 50g of water at 100°C to steam at the same temperature? (Specific latent heat of vaporization of water = 2260 Jg-11)

A

1.13 × 10-4J

B

1.31 × 102J

C

1.30 × 104J

D

1.13 × 105J

E

1.31 × 106J

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Physics NECO SSCE 2003 Thermal Physics

Which of the following radiations have the longest wavelength?

A

Gamma rays

B

Infra-red

C

Light waves

D

Radio waves

E

Ultra-violet rays

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Physics NECO SSCE 2003 Thermal Physics

A platinum-resistance thermometer has a resistance of 4Ω at 0°C and 12Ω at 100°C. Assuming that the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45°C.

A

6.0Ω

B

6.42Ω

C

7.6Ω

D

8.4Ω

E

16.0Ω

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Physics NECO SSCE 2003 Thermal Physics

Water in an open container boils at a lower temperature when heated at the top of a mountain than at sea-level because at the top of a mountain

A

pressure is increased

B

pressure is reduced

C

the rays of the sun add more heat to the water

D

the saturation vapour pressure of water is higher than at sea-level

E

the temperature is lower than at sea-level

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Physics WAEC / WASSCE 2003 Thermal Physics

(a) List two types of waves, apart from light, that can be plane polarized. (b) State two applications of plane polarized light.

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Physics WAEC / WASSCE 2003 Thermal Physics

(a) What is meant by the wave-particles duality of matter? (b) mention one physical phenomenon, in each case, that can be explained in terms of the wave nature and particle nature of light.

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Physics WAEC / WASSCE 2002 Thermal Physics

The ice and steam points of a certain thermometer are -20^\circ and 100^\circ respectively. Calculate the Celsius temperature corresponding to 70^\circ on the thermometer

A

84.0o

B

75.0o

C

64.0o

D

58.0o

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Physics WAEC / WASSCE 2002 Thermal Physics

Water of mass 120g at 50oC is added to 200g of water at 10oC and the mixture is well stirred. Calculate the temperature of the mixture. [Neglect heat losses to the surrounding]

A

60oC

B

40oC

C

25oC

D

10oC

medium Difficulty

Physics NECO SSCE 2002 Thermal Physics

If the temperature of a resistance wire is gradually increased, its resistance will

A

decrease gradually

B

first increase and then decrease

C

first increase and then remain the same

D

increase gradually

E

remain the same

medium Difficulty

Physics NECO SSCE 2002 Thermal Physics

Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?

A

Alpha rays

B

Gamma rays

C

Positive rays

D

Ultraviolet rays

E

X-rays

medium Difficulty

Physics NECO SSCE 2002 Thermal Physics

A short response time is obtained in a liquid-in-glass thermometer when the

A

bulb is large and thick-walled

B

bulb is small and thick-walled

C

stem is long and thin

D

liquid is of high density and the bulb is large

E

bulb is thin-walled and the liquid is a good conductor of heat.

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